Blue Leg Hermit Crab - Clibanarius tricolor
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The Blue Leg Hermit Crab (Clibanarius tricolor) is a small, colorful, and active marine invertebrate, prized for its blue-colored legs and algae- and detritus-grazing behavior. This peaceful crab is an excellent addition to reef aquariums, helping maintain clean rockwork and substrate.
Common Name: Blue Leg Hermit Crab
Scientific Name: Clibanarius tricolor
Family: Diogenidae
Size: Up to 1 inch (2.5 cm)
Temperament: Peaceful
Difficulty: Easy
Reef Safe: Yes
Native Region: Found throughout the Caribbean and Western Atlantic, commonly inhabiting sandy and rubble substrates near coral reefs.
Tank Size: Minimum of 10 gallons
Temperature: 74–80°F (23–27°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate: Sand and live rock with crevices for hiding and grazing.
• Algae & Detritus Control: Actively grazes on algae, detritus, and uneaten food.
• Behavior: Peaceful and active; often switches shells as it grows.
• Diet: Omnivorous—accepts algae, detritus, and small meaty foods.
• Tankmates: Compatible with most reef fish and invertebrates; avoid aggressive predators that may harm the crab.
